Re: PS2 mouse going nuts during cdparanoia session.

From: Kristofer T. Karas (
Date: Wed Jul 16 2003 - 14:03:35 EST

Jens Axboe wrote:

>On Wed, Jul 16 2003, Dave Jones wrote:
>>Lost sync here. Mouse dancing. vmstat output stopped for a few seconds.
>Doesn't look really bogged down by interrupt load, still half idle. So
>that looks like a PS2 bug. Unless the irq latencies are really bad,

FWIW, this also affects PPP over an async serial line (in my case to a
56Kb modem). During cdparanoia runs, the modem Tx/Rx lights all but
stop as the missed packets drop retransmissions into the minute+
timeframe. (Oddly, I don't recall seeing framing errors from ifconfig;
must be the lower level ppp substrate or some such...)

I can confirm this with 2.4.20, am mostly certain it affects 2.4.21
(will have to retest to be sure). Similarly to Dave, I'm using an
IDE/ATAPI burner with both DMA and UNMASKIRQ enabled.


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